I spilled Diet Coke on an all cotton shirt. I have used Stain Out on it and washed it about 6 times, every time I have clothing the same color, using the Stain Out each time. I also called the Coke company and they couldn't help me. Any suggestions for removing Diet coke stains from a 100%cotton shirt?

Good old Fels Naptha. Our grandmothers used it years ago! You'll find it in the cleaning section at the grocery store. Look near the bathroom sprays, floor waxes etc. Just wet the bar and rub it over the stain and wash as usual. You can "shave" some into the washer instead of laundry soap as a money saver too!